中子、γ射线在稀土-高分子材料中的输运

呼延雪莹; 胡碧涛

中子、γ射线在稀土-高分子材料中的输运

兰州大学核科学与技术学院,甘肃,兰州,730000

Calculations of Neutron and y Transport through Rare-earth Doped Polymer

摘要: 为研究新型复合屏蔽材料的最佳厚度与各种成分最佳配比,用MCNP计算了中子、γ射线在稀土-高分子与重金属复合材料中的通量.对中子、γ射线在屏蔽体中变化规律进行了深入探索,同传统复合屏蔽材料的屏蔽性能进行了对比.结果表明,中子和γ射线通过屏蔽体时,其强度遵循指数衰减规律.新型屏蔽材料对中子的屏蔽效果均优于铅硼聚乙烯,对γ射线的屏蔽效果均劣于W-Ni合金,且并非稀土含量越高,材料对中子辐射屏蔽能力越强.

关键词:

Abstract: A series of shielding analyses have been performed to estimate the material composition and optimum thickness required for a new radiation shield with various rare-earth doped polymer and heavy metal mixtures.The neutron and y photon fluxes have been calculated by Monte Carlo N-Particle(MCNP) transport code.The results indicate that the relative fluxes of y photon and neutron in both traditional and new composite materials follow an exponential decay rule with the distance of penetration.It can be seen that the composite material consisting of rare-earth doped polymer and heavy metal has stronger neutron shielding performance than lead-boron polyethylene,but weaker y shielding effectiveness than W-Ni alloy.It isalso found that materials with more components of rare earth elements don't always provide better neutron shielding performance.

中子、γ射线在稀土-高分子材料中的输运

兰州大学核科学与技术学院,甘肃,兰州,730000

关键词:

Calculations of Neutron and y Transport through Rare-earth Doped Polymer

兰州大学核科学与技术学院,甘肃,兰州,730000

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